This box came off of my 2014 Can-Am Maverick. It will fit all models of Maverick, to my knowledge. According to Super ATV this box will not work if you have a harness bar mounted on your Maverick, but I had one and made the box work just fine. The holes in the box bottom are located so that the box will work on a Maverick with the harness bar, it just mounts farther to the rear of the rack. 

Works perfectly. No flaws. Always garaged. Comes with all hardware as shown in pics. 

Manufacturer description:

Can-Am Maverick Rear Cargo Box
Will fit: 
Can-Am Maverick 2-seater : 2013+

This easy to install rear cargo box for the Can-Am Maverick allows you to secure and store your belongings in the bed of the Maverick.

• Quick and easy install
• Water resistant
• Rubber gasket to keep dirt and moisture out
• Convenient storage for trail gear
• Securely attaches to bed

Includes everything you need to install and use within minutes.